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We used a lock mimicking what apache does for preforked children.
But it doesn't work properly in our case because we do not stop once a request
has been served. Clients are allowed to perform multiple requests and keep the
connection open.
This means that if we allow multiple clients per children, then a child could
take the lock and then be asked to do a long or even locking operation by a
client it already is serving. This woulkd cause the whole server to deadlock,
as the child is now busy and also holding on the lock.
Using a race on accept() by having a tevent_fd on the listening socket wait
for read events we never deadlock. At most we cause a bit of contention among
children. But in the generic case connections are much less frequent for us as
clients tend to be long lived. So the little contention we may have is not a
big deal.
Signed-off-by: Andreas Schneider <asn@samba.org>
Signed-off-by: Simo Sorce <idra@samba.org>
We were not properly managing allowed clients and pool management was
duplicated across a few callers.
Concentrate all management heuristics in one single function.
Signed-off-by: Andreas Schneider <asn@samba.org>
Signed-off-by: Simo Sorce <idra@samba.org>
Signed-off-by: Andreas Schneider <asn@samba.org>
Autobuild-User: Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date: Thu Aug 11 17:09:30 CEST 2011 on sn-devel-104
The FLAG_MSG_PRINT_NOTIFY class is actually obsolete and never used, as the
only message belonging to it is not used either.
Signed-off-by: Andreas Schneider <asn@samba.org>
Be more correct in load printers at startup.
If async process have already started we do not need to force a reload, but we
just need to load the printers. If other process have not finished initializing
it makes no sense to try to force them as they are masking SIGHUP unitl init is
done anyway.
Signed-off-by: Andreas Schneider <asn@samba.org>
The background queue process is repsonsible for that.
Just reload printers if necessary or wait for a message from bq to do that.
Signed-off-by: Andreas Schneider <asn@samba.org>
The cups backend forks a child to do asynchronous work.
We need a sigchld handler in bq to properly wait for the chilod to finish and
reap it, otherwise it hangs the forever as a zombie process.
Signed-off-by: Andreas Schneider <asn@samba.org>
Children were not properly receiving messages to reload printers when
the background queue process was dispatching them.
Signed-off-by: Andreas Schneider <asn@samba.org>
Children Ids must start at 1 as 0 represent the father.
Also fix callbacks that restart logs to use a procedd global variable that
holds the Id so that they work correctly both fot the parent process and the
children.
Signed-off-by: Andreas Schneider <asn@samba.org>
This allows for setting up signal handlers earlier which is needed
for the following patch. It also simplify the code in a few places.
After all we never have more than pool active at any time during
spoolssd life span.
Signed-off-by: Andreas Schneider <asn@samba.org>
This way each child has its own log file and avoid mixing all logs form all
children in the same parent log file.
Signed-off-by: Andreas Schneider <asn@samba.org>
This way we are sure the cache is primed properly and messages can be sent to
processes if necessary as all messaging has been set up.
Signed-off-by: Andreas Schneider <asn@samba.org>
We need to properly handle preforked children so it is better to just do that
automatically.
If the parent needs/wants to intercept SIGCHLD events it can set a callback
that will be called by the prefork code once the internal cleanup function that
checks all prefork children has been executed.
Signed-off-by: Andreas Schneider <asn@samba.org>
Use a child for the background updater process
Forward printer update messages from spoolss to background update process.
Signed-off-by: Andreas Schneider <asn@samba.org>
This way the parent doesn't need to know how to handle dead children and
keeps all of that within the prefork abstraction.
Signed-off-by: Andreas Schneider <asn@samba.org>
example:
spoolssd:prefork = 10💯5
will configure spoolssd to start with a minimum of 10 preforked children,
a max set to 100 children and spawns/retires 5 children at a time when
ramping up/scaling down.
Signed-off-by: Andreas Schneider <asn@samba.org>
This way we can properly deal with pcap updates in the background queue process
if it is enabled (on by default) and not perform these actions in the main
smbd process.
Signed-off-by: Günther Deschner <gd@samba.org>
Also start new folder lib/dbwrap/ where dbwrap_open.c is stored and
make the fallbacke implementation functoins non-static and create a
dbwrap_private.h header file that contains their prototypes.
This patch finally has the same structure being used to describe the
authorization data of a user across the whole codebase.
This will allow of our session handling to be accomplished with common code.
Andrew Bartlett
Signed-off-by: Andrew Tridgell <tridge@samba.org>
This makes auth3_session_info identical to auth_session_info
The logic to convert the info3 to a struct auth_user_info is
essentially moved up the stack from the named pipe proxy in
source3/rpc_server to create_local_token().
Andrew Bartlett
Signed-off-by: Andrew Tridgell <tridge@samba.org>
This brings this structure one step closer to the struct auth_session_info.
A few SMB_ASSERT calls are added in some key places to ensure that
this pointer is initialised, to make tracing any bugs here easier in
future.
NOTE: Many of the users of this structure should be reviewed, as unix
and NT access checks are mixed in a way that should just be done using
the NT ACL. This patch has not changed this behaviour however.
Andrew Bartlett
Signed-off-by: Andrew Tridgell <tridge@samba.org>
This seperation between the structure used inside the auth modules and
in the wider codebase allows for a gradual migration from struct
auth_serversupplied_info -> struct auth_session_info (from auth.idl)
The idea here is that we keep a clear seperation between the structure
before and after the local groups, local user lookup and the session
key modifications have been processed, as the lack of this seperation
has caused issues in the past.
Andrew Bartlett
Signed-off-by: Andrew Tridgell <tridge@samba.org>
WERR_INVALID_PRINTER_NAME only needed to be handled when printing tdb
migration used spoolss, with winreg such errors are no longer possible.
Signed-off-by: Günther Deschner <gd@samba.org>
Autobuild-User: Günther Deschner <gd@samba.org>
Autobuild-Date: Thu Jul 7 19:15:34 CEST 2011 on sn-devel-104
